Philly landlords and Philadelphia rental property investors need to think twice before adding in-unit laundry to their rentals. It sounds like a great amenity, but when tenants are moving washers and dryers in and out themselves, one bad hookup can turn into water leaks, damaged floors, ruined ceilings, and thousands in repairs. That is why a lot of experienced Philadelphia landlords keep laundry in the basement where leaks are easier to control and the property is easier to protect.